INTERNATIONAL ELECTROTECHNICAL COMMISSION

IEC TR 61850-90-13Deterministic Networking in Power Automation

Maik Seewald

IEC TC57, WG10

maseewal@cisco.com

2

IEC 61850 in a nutshell

Title: Communication networks and systemsfor power utility automation

The design objectives are:

Interoperability (between devices & systems) Free configuration (free allocation of

functions to devices) Long term stability (layered, object-model

based design, consistent configuration language)

Extensibility (into new domains or even other IoT verticals)

Contains also environmental and conformance testing requirements

Security is defined in IEC 62351 (1-13) Status: No Fieldbus Variety in Power Automation!

IEC 61850 has left the substation!

Source: IEC TC57 WG10-IEC 61850

Core Building Blocks

3

Obj

ect M

odel

• Describes primary and secondary equipment

• Based on a hierarchical data model

• Object model is independent of underlying communication protocols

• Logical nodes are the core components

• Names of logical nodes are standardized (4 characters) Com

mun

icat

ion

• Between IED‘s and the Substation Automation System (SAS)

• Between all devices capable of IEC 61850

• Based on Client/Server and Publish/Subscriber concepts

• Mapping to protocols (IPv4/v6, L2)

• Redundancy based on PRP/HSR

• PTP Profile is: IEC 61850-9-3 C

onfig

urat

ion

• Configuration Language (SCL, XML-based)

• Describes a device and it’s capabilities

• Describes the installation

• Allows comprehensive engineering

• Object model and configuration also used for/in network gear

Intro: IEC 61850 Protocol Stack

MAC

ACSI

link

physical layer

networktransport

session

802.1Q

PT = 88-F7PT = 88-B8PT = 88-BA

hard real-time stack

link redundancy entity IEC62439-3 [PRP / HSR (PT = 89-2F) / PTP] (O)

Ethernet B Ethernet A

TCP RFC 793

IP

ISO TransportRFC 1006

ISO SessionISO/IEC 8326:1996

Abstract SyntaxISO/IEC 8824-1:2008

MMSISO 9506-1:2003

PT= 08-00

VLAN & priority tag 802.1Q (O)

soft real-time stack

Publisher - Subscriber services (multicast)

Client - ServerCore ACSI services

(Type 2,3,5)

802.1Q 802.1Q (O)VLAN

ACSEISO/IEC 8649:1996

PresentationISO/IEC 8822:1994

Generic Object-

Oriented Substation

EventsGOOSE

(Type 1, 1A)

T-pr

ofile

R-GOOSEIP (O)

UDP RFC 768

NetworkTime

Protocol

(Type T0, T1)

SNTPRFC 4330R-SV

IP (O)

Sampled Values

(SV)

(Type 4)

PrecisionTime

Protocol

IEC 61588IEC /IEEE61850-9-3(Type T5)

Source: IEC TC57 WG10-IEC 61850

5

Intro: TR IEC 61850-90-13

The NWIP (IEC 61850-90-13: Deterministic Networking Technologies) has been approved in 2017

A Task Force has started to develop the Technical Report on Deterministic Networking

The TR will cover LAN (Substation Automation Network) and WAN uses cases and profiles

Utility, Communication, and Device Experts (IED) are participating in this effort

Liaisons with SC65C and with JWG IEC/IEEE 60802 & 802.1TSN in place/in development

Compatibility and brown-field deployments are key concerns

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TF 61850-90-13: Artefacts

IEC 61850-90-13 Draft (+comments) and finalized Problem Statement Use case document (v14) as pre-work Proposal (Traffic Type Mapping) Questionnaire (sent to utility experts and to CIGRE B5 WG) Problems with existing solutions and technologies Improvements for current applications from using the capabilities of

deterministic communication technologies and possible future applications Questions related to Network Infrastructure and Topology (Substation-LAN and WAN)

IEEE H30 WG feedback on Ethernet reliability PacWorld Article (provided by Hubert Kirrmann) IEEE White Paper (provided by Chris Huntley) PacWorld Article (provided by Patrick Wetterwald & Maik Seewald)

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TF 61850-90-13: Content

Problem Statement

Determinism and converged networking

Support and improvements for existing use cases (Substation, WAN)

New use cases and opportunities (Converged Networking)

Deterministic networking technologies (Overview)

Relation of TSN to technologies such as SDN (Software Defined Networking) and NFV (Network Function Virtualization)

Use Cases related to non-functional requirements: Usability, Manageability, Network Security, Multi-Service Architecture

Utility Automation Profile (at least conceptual)

Interoperability and Brownfield considerations

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TF 61850-90-13: Current LAN-Architecture (in a nutshell)

Currently, the power automation industry uses a packet switched architecture (especially in substation automation) supported by high-speed Ethernet. In order to achieve the delay and packet loss requirements, the network bandwidth is overprovisioned. Means, a very low efficiency in terms of resource usage.

Source: IEC TC57 WG10-IEC 61850

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TF 61850-90-13: TSN-Benefits

Deterministic Network

Network convergence with best effort traffic

Seamless redundancy

on a single mesh network

Seamless redundancy for

individual streams

Application Requirements

Meets latency budget

No asymmetric delayZero jitter

Zero congestion loss

Quality Attributes

Network optimization

Flexible Topologies

Usability Simplified

engineering

Cyber securityenhancements

Multi-ServiceCapabilities

Synchro-phasor traffic over station

bus

Sampled Valuesover process bus

GOOSE over process bus

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TF 61850-90-13: Key Objectives and Concerns

Real-Time and Deterministic Behavior

Network Convergence[Multi-Service Architecture]

Stability of existing deployments[Compatibility (PRP, HSR, PTP) and Brownfield]

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TF 61850-90-13: Key References

IEC 61850-90-13Deterministic Network

Technologies

IEEE 802.1TSN[for LAN Use Cases in Substation Automation]

IETF DetNet[for WAN Use Cases: Tele-Protection, Substation to Substation, Substation to

Control Center, DER]

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TF 61850-90-13: Key References

IEC 61850-90-13Deterministic Network

Technologies

IEEE 802.1TSN[for LAN Use Cases in Substation Automation]

IETF DetNet[for WAN Use Cases: Tele-Protection, Substation to Substation, Substation to

Control Center, DER]

IETF Deterministic Networking Use Casesdraft-ietf-detnet-use-cases-19:

...contains relevant use cases. But: with having DetNet/TSN available in products and solutions, new use cases will emerge.

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TF 61850-90-13: Objectives

Support and improvements for existing use cases (Substation, WAN, DER, DA)

Address new use cases and opportunities - Multi-Service capabilities based on converged networking: CONVERGENCE … heterogenous applications running on devices connected to the same physical network (LAN, WAN, or combination of both) are able to exchange data within the defined QoS parameters derived from application requirements

Definitions and Recommendations (Conceptual Utility Automation Profile) in synch with IEC/IEEE 60802 – TSN Profile for Industrial Automation

Again: Interoperability and Brownfield are key!

INTERNATIONAL ELECTROTECHNICAL COMMISSION

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